Seat Adjust Knob

This part is NO LONGER AVAILABLE. You cannot purchase this part. Can I still get this?

Listed on the following equipment:
True Fitness - 750 Upright Bike 1 Piece Crank - TU 750 (S/N After-02-UP0161C)
True Fitness - 750 Upright Bike 3 Piece Crank - TU 750 (S/N Below-02-UP0161C)

* Images may not be identical to part.